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Near-room-temperature refrigeration through voltage-controlled entropy change in multiferroics
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10.1063/1.4788690
/content/aip/journal/apl/102/3/10.1063/1.4788690
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/3/10.1063/1.4788690
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) M 2 vs. T representation of magnetization data of a LSMO (20 nm)/PMN-PT for zero (squares) and 7.0 kV/cm (circles) applied electric field. (b) Linear plot M vs. T (squares E = 0, circles E = 7 kV/cm) together with best fits of the Landau-type functional form of the magnetization (lines). 27

Image of FIG. 2.
FIG. 2.

Sketch of the temperature dependence of the entropy for E = 0 (circles) and E = E f > 0 (squares) according to Eq. (11) . The line (right axis) shows the temperature dependence of the isothermal entropy change. T C(0) and T C(E = E f) are the critical temperatures (dashed lines) of the ferromagnetic film in electric fields E = 0 and E = Ef, respectively.

Image of FIG. 3.
FIG. 3.

Suggested nanofabrication of magnetocaloric materials for voltage-controlled entropy change. Magnetic material (light gray) with magnetoeleastic properties such as LSMO interacts with piezoelectric material (dark gray/on-line red) such as PMN-PT when brought in close proximity. Possible nanostructured two-phase multiferroics can have grain structure (a), layered heterostructures (b), columnar structure of piezoelectric material in magnetic matrix (c), or vice versa (d).

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/content/aip/journal/apl/102/3/10.1063/1.4788690
2013-01-25
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Near-room-temperature refrigeration through voltage-controlled entropy change in multiferroics
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/3/10.1063/1.4788690
10.1063/1.4788690
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